Its a strange argument about economics. Times are tough in the UK concerning golf and memberships, but I am not noticing signs which welcome mobile phones on the course. Generally speaking, at the clubs I visit, mobile phones are on the course or talking in the house are frowned upon, not just by rule makers, but by members. Okay, some of this may be a cultural thing just like hats in the house, but I find it hard to believe a club can't make a go of it without allowing phone usage on the grounds.
Incidentally, it would be nice if just a few of the "must have my phone 24/7" guys would at least admit that this is a preference, desire or even an addiction, but not essential to carry on with a job or family. What, others don't have the same commitments, ambitions, pressures? of course others do. No, this is not an essential aspect for just about everybody on this planet - its much more of a life style choice.
Ciao